Record Details

Quantification of changes in seabed topography with special reference to Hansthal Creek, Gulf of Kachchh, India

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Quantification of changes in seabed topography with special reference to Hansthal Creek, Gulf of Kachchh, India
 
Creator Pattanshetti, S.S.
Chauhan, O.S.
Sivakholundu, K.M.
 
Description Variations in the bathymetry in macrotidal Hansthal Creek between 1984 and 1950 along 14 closely spaced lines, are used to quantify the volumetric changes in seabed topography in terms of erosion/accretion. Two surfaces from the bathymetric data of 1984 and 1950 have been modelled. The profile wise comparison along the transects indicates a dynamic deformation due to distinct alteration in the shoreline and a shift in the channel course. The shoreline has retreated 650 and 450 m on the northern and southern banks respectively. The studies suggest scouring of horizontally deposited fine sediments (clays deposited in an antecedent depositional phase) in the Hansthal Creek due to existing dynamic equilibrium among (a) influence of physiography in amplifying the tidal range, (b) increased efflux due to contribution through inter-creek water movements, and (c) high magnitude currents. Magnitude of erosion in the creeks, particularly on the flanks, is much more than in the axial channel. The degree of the erosion reduces from the Hansthal Creek mouth to inland (area in the close vicinity of Little Gulf of Kachchh). During the last 34 years about 71.5 x 10 super(6) m super(3) from this creek during the course of the present study. Offshoreward movement of scoured sediments and their redeposition in the outer gulf as a fill in the paleo-channel is observed
 
Date 2009-05-06T10:40:25Z
2009-05-06T10:40:25Z
1993
 
Type Journal Article
 
Identifier Journal of Coastal Research, Vol.9(4); 934-943p.
http://drs.nio.org/drs/handle/2264/2821
 
Language en
 
Rights Copyright [1993]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Coastal Research Foundation